Staff Engineer - Full Stack (f/m/d)

We're looking for

At thermondo, our mission is to decarbonize every home , and technology is our primary lever for change.We are disrupting a massive industry bogged down by legacy systems and manual work. This is where you come in. We build the intelligent software and automation that gives us a decisive edge, allowing us to operate at a scale and efficiency our competitors can't match.We are looking for a Staff Engineer - Full Stack (f/m/d) to serve as a strategic technical leader. In this role, you will not just solve the problems we hand you; you will identify the problems we should be solving. You will report to a Domain Lead and act as a technically-focused peer, helping to define the vision for our platform and the AI strategies that will differentiate us in the market.

If you enjoy this

• Drive cross-team technical strategy. You will architect the high-level systems that connect our customer apps, internal tools, and data backbone, ensuring we build for long-term scalability and resilience.
• Operate with high-level autonomy. You will translate vague business objectives into concrete technical roadmaps, proactively identifying opportunities for impact without needing a Product Manager to define every step.
• Lead our AI Engineering evolution. You will co-design the patterns for integrating LLMs into our code - handling reliability, cost, and evaluation - while demonstrating to the wider organization how to build AI-native software.
• Act as a force multiplier. You will elevate the entire department by removing developer bottlenecks, mentoring engineers, and championing AI-augmented workflows.
• Bridge the gap between Business and Tech. You will partner with leadership to navigate ambiguity, translating complex architectural trade-offs into business value and leading large-scale initiatives to delivery.

And recognise yourself here

• Experienced: You have significant experience (10+ years) in software engineering, including operating at a Lead or Staff level in a modern product company.
• Full Stack: You have deep, T-shaped expertise. You are great in Python and Node.js/TypeScript. You understand backend and frontend. You can reason about data flows and architecture, and you can build them too.
• "Manager of One": You are self-directed. If dropped into ambiguity, you create clarity. You can effectively manage your time between coding, designing, and communicating without needing constant oversight.
• Pragmatic: You avoid over-engineering. You understand that "boring technology" is often best, but you know exactly when to spend innovation tokens (specifically on AI and Cloud scalability).
• Great Communicator: You write clear, persuasive technical documents (RFCs, ADRs). You can lead a room of engineers to a consensus even when opinions differ. You can articulate the business implications of technology in a room full of VPs.

Bonus points

• Production AI: Experience deploying LLMs in production (managing context windows, prompt engineering, vector databases, and evaluation frameworks).
• Event-Driven Systems: Deep experience with asynchronous architectural patterns and specific systems like RabbitMQ, Google Pub/Sub and Kafka.
• Legacy Migration: Experience strangling a monolith or migrating legacy systems to modern cloud-native architectures without downtime.
• Familiarity with Sales : Experience writing software that enables Sales teams (ex: CRM, scheduling).
• A passion for climate tech. You're motivated by our mission to decarbonize homes and are excited to apply your skills to a problem that matters.

What we have to offer

• In this role, you can expect an attractive compensation package starting from €100.000
• Join a team of Product Managers, Software Engineers, Designers, Data and Salesforce people who are excellent in their craft and are happy to share their knowledge and help you grow alongside them
• Our team is using the latest frameworks and is working with a modern tech stack to build powerful products for our customers, craftspeople, and internal teams
• Boost your skills with a dedicated annual learning budget to spend on conferences, courses or books
• Choose your own AI coding companion – we provide you with the license for the AI model or assistant of your choice
• We offer a challenge with purpose - the better our tech, the more people will live climate-neutral and the better the world becomes for future generations
• We offer a fantastic culture in the tech team and beyond
  • Modern office in the heart of Berlin
  • Work from home - up to 3 days a week
  • You receive an Urban Sports Club membership & nilo.health membership
  • You can lease a job bike or bring your dog one day/week
  • Corporate Benefits at more than 100 partners
  • 20% employer contribution to your pension and disability insurance

About us

Every application is welcome here - regardless of gender, nationality, ethnic and social background, religion, ideology, disability, age, sexual orientation or identity. We are convinced that everyone is valuable and deserves a fair chance.

Software has always been part of thermondo’s DNA. We have been the first to digitize trade a decade ago. Today, our proprietary software enables 800 thermondinos to scale the heating transition in Germany. But we want more. We want to enable fully digitized and smooth customer journey ensuring that all processes are coming together: commercial funnel, procurement, product, supply chain, project management, finance, dispatch, HR planning as well as customer facing offerings for maintenance and home energy management.
Our product & tech teams in Xberg - the heart of Berlin - are a highly diverse and multicultural bunch. They make sure that we can make a difference and scale the energy transition in Germany and work closely together with all departments.

Join our product & tech teams and pave the way for climate neutral living.

Dein Bewerbungsprozess

• An initial interview with your Talent Acquisition partner, Jenny
• If we are both on the positive side, you will talk to our VP of Engineering Pedro
• Then, you will have the opportunity to meet with your to-be teammates.
• Finally, Become a thermondino!

*The exact salary level will be defined during the interview process, based on your experience, qualifications, and the level of responsibility required for this role